Carbon-sheet.



J. A. B. SMITH.

CARBON SHEET.

APPLICATION FILED DEG. 10, 1914.

1 13 3310 Patented Mar.30,1915.

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dEfiSE A. 13. SM, UF-IBROOYN, NEW YORK, ASSIGNOR T0 UNIDERWUOID 'rrrnwnr COMPANY, 01F NEW YORK, 1t". ii, A CQQRATION OF DELAWARE.

CARBON-SHEET.

To all whom it may concern:

Be it known that T, Jesse A. B. SMITH, a citizen of the United States, residing in Brooklyn borough, in the county of Kings, city and State of New York,,have invented certain. new and useful Improvements in Carbon-Sheets, of which'the following is a specification.

This invention relates to carbon sheets for use in a typewriting machine, such as made the subject of application No. 840,672, filed May-25, 191%, by Wernery and Smith. In operating said machine, several webs or work-sheets with intervening carbons are advanced at the same time, and after completion of the writing of a page, the pages are torn ofif, but the carbons are retracted, being drawn back between the. webs into position for the writing of the fresh page. The carbon sheets are drawn back simultaneously by means of suitable mechanism, each carbon being attached to an a. These arms are inthe form of blades or bars which are arranged one behind another, in order .to avoid undue separation of the plies of webs. Tt has been the custom, after attaching the rear edges of the carbon sheets to the successive arms or bars at the rear, to trim 0d the leading edges of the'c'arbons, so that said edges register with one another.

The principal object of the present invention' is to avoid loss of time *andmaterial in trimming od the carbon sheets, and to make it simple and easy to assemble the carbons in the machine, with their leading edges in alinement with one another.

To carry out this invention, ll form each carbon sheet at its rear end with an extension of clear paper, that is, paper on which there is no coating of carbon, the extension being preferably integral with the carbon coated sheet; and this extension is provided with'transverse lines or marks, at intervals corresponding to the spacing ot' the bladelike bars or arms oi the typewriting machine. The extension may therefore be tolded at the first line it the carbon is to be at tached to the first arm, or at the second line it the carbon is to be attachedto the second arm, to the third line it the carbon is to be,

attached to the third arm, and at the tourth line it the carbon is to, be attached to the fourth arm, and so on the lines being preterably marked accordlngly, and 4:. When the sheets are folded npon Specification of Letters Patent.

Patented mar. no, rain Application filed December 1Q, 1914. Serial Ito. create.

the respective arms in accordance with such marking upon the extensions, the. leadin edges of the carbon sheets will registerwi one another in the typewriting machine. By reason of the sheets being folded upon or the arms, thelatter are enabled to draw the carbon sheets backwardly between the plies of the webs; whereby each. carbon maybe used in writing a great numberof pages,

In the accompanying drawing, Figure-1 is at a perspective view of a part oil a typewrit ing machine, showing the carbon-control.-

, ling arms and the carbon sheets with their extensions folded around the arms, the for: ward ends of the carbon sheets being in regre ister, as shown in dotted lines. .The'worksheets are shown as plaited or folded like a tan or an accordion, the carbons being inserted in the folds. Fig. 2 is a perspective view of a carbon sheet provided at the end 75 opposite its leading end, with an extension having told marks and numbers, to guide the operative in attaching the carbon sheets to the arms. .l ig. 3 is a diagrammatic sectional side elevation of a, portion of an Un- M derwood front-strike typewriting machine a of the kind shown in said application, to

illustrate the general arrangement of the platen, work-sheets and carbons.

Types 1 strike against the front of a 35 platen 2, to make impressions on worksheets 3, between which are gathered carbon sheets t. The latter are attached to recip rocating carriage 5, which is drawn lion wardly by the platen as the sheets advance around the same. The return of said carriage may be edected in any desired way. The carriage slides to and fro upon a track or frame 'l. Detachably mounted upon the carriage 5 are four blade-like bars or arms $5 8, to which the carbon'sheets are attached at their rear ends. The bars 2% are arranged edge to edge in rear of one another, and about on. the same level. Each carbon sheet is provided at its rear end with an extension or tab 9,.pre1terably oi uncoated clear paper a and integral with themain sheet, and having transverse lines or marks lllthereon', to indicate to the operator the various places at which the tab may be folded, according 1% to the position of the arm to which the sheet is to be attached; and the arms may be a to bored to correspond with these lines on the sheets, as seen at Fig i. The line on the tab nearest to the carbon portion at the sheet in mm numbered 1, which indicates that the tab is to be folded over the nearest of the bars 8. If the sheet is to be attached to.the second bar, the tab Will be folded at the line 2 instead of at the line 1. The 2 line on the sheet is spaced from the 1 line by the distance between the rear edges of the bars. In the same manner, the sheet is to be folded at the 3 line if it is to be attached to the third bar,'or at the 4 line if it is to be attached to the rearmost bar of the set. By this means all'of the leading edges of the carbon sheets are brought into proper aline- Y ment or register, Without Waste of carbon or loss of time in trimming ofl the edgesthere of. Each folded sheet may be held upon its bar by an ordinary paper-clip 11.

Variations may be resorted to Within the scope of the invention, and portions of the improvements may be used Without others. 1I -Iaving thus described my invention, I 0 mm:

of spaced transverse fold-lines,

1. A'ca'rbon sheet having a leading end and an end opposite thereto, and having at said opposite end an uncoated integral extension, said extension provided with a series of transverse fold-lines for the purpose specified.

2. A carbon sheet having a leading end and an end opposite thereto, and having at said opposite end an uncoated integral extension, said extension provided with a series of transverse fold-lines for the purpose specified, said fold-lines being numbered.

3. A carbon sheet having a top end and a bottom end, and having at said bottom end an uncoated extension provided with a series for the purpose specified.

JESSE A. B. SMITH.

Witnesses:

W. O. WESTPHAL, DELOS G. HAYNES. 

